The Alaska Division of Elections on Friday certified the state’s Aug. 16 special general election for U.S. House, confirming Democrat Mary Peltola as the winner.

Peltola will be sworn in as Alaska’s lone U.S. representative later this month after defeating Republican candidates Sarah Palin and Nick Begich III.

Though elections officials are still compiling statistics from the vote, political advisers, pollers and independent observers say there are five early lessons from Alaska’s first ranked choice election:

Ranked choice voting mostly worked

In results shared by the Division of Elections on...